Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a09ed73c5a17df8…

MALICIOUS

PDF

41.1 KB Created: 2020-09-02 16:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19a28689ea4a38bf269d5ea3c62985e9 SHA-1: 7765fe830310736f5b8cfd70bc1a4133174e431f SHA-256: 0a09ed73c5a17df8bfb0ce951a2003363c14af022e27d8dbb1d97a73f717ee1e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL is https://ttraff.ru/wix?keyword=machine+learning+powerpoint+template, which is likely part of a SEO spam campaign to distribute malware. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user curiosity or search engine optimization tactics to deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wix?keyword=machine+learning+powerpoint+template
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_21cb4e68ab704fa3b620b496ca41d391.pdf
    • https://static.usrfiles.com/ugd/911c12_1a66d60743124463a5e073c4a37f7917.pdf
    • https://static.usrfiles.com/ugd/b8c837_4985129fd57a4576b36b95f300dba106.pdf
    • https://static.usrfiles.com/ugd/65b209_9a376e2534f94a599ee37b18b5462bd6.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/wuxinoloxijiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/diamond_plate_sheet_metal_near_me.pdf
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/appvn_2019_apk.pdf
    • https://static.usrfiles.com/ugd/b8c837_e493c43c351d435586e1493ad4218776.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc7be2a4f37d4ee185b095c27b16b510.pdf
    • https://static.usrfiles.com/ugd/32acb1_b34d3290907e49119b5f7e3aacec0168.pdf
    • https://static.usrfiles.com/ugd/a382ee_5adfd95e471a4ef2a56cfa0f10246eb1.pdf
    • https://static.usrfiles.com/ugd/2f7815_0ed5b6635f894aba8da511e6e6299722.pdf
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/bafupuxizovele.pdf
    • https://cdn.shopify.com/s/files/1/0435/4726/3131/files/30_day_notice_to_quit_california_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/0894/9409/files/kutugeferemegok.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006393.bin
6c7ca979e4b0f33633ac47eeef53f897caa019def9716022ae3116f54a0ca0ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6393 5264 bytes
font_01_sfnt_off00007572.bin
77882d4d7261c6d6f83864fe52df92890a91252c8476b654cb276ac3ef2fbb2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7572 10028 bytes

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